@neo-one/smart-contract-compiler
Version:
NEO•ONE TypeScript smart contract compiler.
37 lines (35 loc) • 1.43 kB
JavaScript
import { tsUtils } from '@neo-one/ts-utils';
import { BuiltinInstanceMemberCall } from '../BuiltinInstanceMemberCall';
export class BufferSlice extends BuiltinInstanceMemberCall {
canCall(_sb, _func, node) {
return tsUtils.argumented.getArguments(node).length <= 2;
}
emitCall(sb, func, node, optionsIn, visited) {
const options = sb.pushValueOptions(optionsIn);
const expr = tsUtils.expression.getExpression(func);
if (!visited) {
sb.visit(expr, options);
}
sb.emitHelper(node, options, sb.helpers.unwrapBuffer);
const args = tsUtils.argumented.getArguments(node);
if (args.length === 1) {
sb.visit(args[0], options);
sb.emitHelper(node, options, sb.helpers.unwrapNumber);
sb.emitHelper(node, options, sb.helpers.bufferSlice({}));
}
else if (args.length === 2) {
sb.visit(args[1], options);
sb.emitHelper(node, options, sb.helpers.unwrapNumber);
sb.visit(args[0], options);
sb.emitHelper(node, options, sb.helpers.unwrapNumber);
sb.emitHelper(node, options, sb.helpers.bufferSlice({ hasEnd: true }));
}
if (optionsIn.pushValue) {
sb.emitHelper(node, options, sb.helpers.wrapBuffer);
}
else {
sb.emitOp(node, 'DROP');
}
}
}
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